
6
IDT54/74FCT16652T/AT/CT/ET, FCT162652T/AT/CT/ET
FAST CMOS 16-BIT BUS TRANSCEIVER/REGISTER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
POWER SUPPLY CHARACTERISTICS
Parameter
Test Conditions
(1)
Min.
—
Typ.
(2)
0.5
Max.
1.5
Unit
mA
I
CC
Quiescent Power Supply Current
TTL Inputs HIGH
Dynamic Power Supply Current
(4)
V
CC
 = Max.
V
IN 
= 3.4V
(3)
V
CC
 = Max.
Outputs Open
xOEAB = x
OEBA
=GND  
One Input Toggling
50% Duty Cycle
V
CC
 = Max.
Outputs Open
f
CP 
= 10MHz (xCLKBA)
50% Duty Cycle
xOEAB = x
OEBA
=GND
One Bit Toggling
fi = 5MHz
50% Duty Cycle
V
CC
 = Max.
Outputs Open
f
CP 
= 10MHz (xCLKBA)
50% Duty Cycle
xOEAB = x
OEBA
=GND
Sixteen Bits Toggling
fi = 2.5MHz
50% Duty Cycle
I
CCD
V
IN
 = V
CC
V
IN
 = GND
—
75
120
μ
A/
MHz
I
C
Total Power Supply Current
(6)
V
IN
 = V
CC
V
IN
 = GND
—
0.8
1.7
mA
V
IN
  = 3.4V
V
IN
  = GND
—
1.3
3.2
V
IN
 = V
CC
V
IN
 = GND
—
3.8
6.5
(5)
V
IN
  = 3.4V
V
IN
  = GND
—
8.3
20.0
(5)
NOTES:
1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at V
CC 
= 5.0V, +25
°
C ambient.
3. Per TTL driven input  (V
IN 
= 3.4V).  All other inputs at V
CC 
or GND.
4. This parameter is not directly testable, but is derived for use in Total Power Supply Calculations.
5. Values for these conditions are examples of the I
CC
 formula.   These limits are guaranteed but not tested.
6. I
C
 = I
QUIESCENT
 + I
INPUTS
 + I
DYNAMIC
I
C
 = I
CC
 + 
I
CC
 D
H
N
T
 + I
CCD 
 (f
CP
N
CP
/2 + f
i
N
i
)
I
CC
 = Quiescent Current (I
CCL
, 
I
CCH
and  I
CCZ
)
I
CC
 = Power Supply Current for a TTL High Input  (V
IN
 = 3.4V)
D
H
 = Duty Cycle for TTL Inputs High
N
T
 = Number of TTL Inputs at D
H
I
CCD
 = Dynamic Current Caused by an Input Transition Pair (HLH or LHL)
f
CP
 = Clock Frequency  for Register Devices (Zero for Non-Register Devices)
N
CP
 = Number of Clock Inputs at f
CP
f
i
 = Input Frequency
N
i
 = Number of Inputs at f
i
2549 tbl 08